Chapter 5. Configure via Console Port
5-15
STU-C
(E1)
STU-R
(V.35)
DTEDTE
V.35
E1 SHDSL
Frame N x 64 (N=1~32)
STU-C
(V.35)
STU-R
(E1)
DTEDTE
E1
V.35 SHDSL
Frame N x 64 (N=1~32)
Time slot, N value, is place of data in the frame. Time Slot Number 1~31
(N=1~31) is Fractional E1 and Time Slot Number 32 (N=32) is unframed.
Fractional E1
For fractional E1, FE1, the data rate is from 64k, N=1, to 1984k, N=31,
according to the E1 frame. If the E1 frame is FAS or FAS+CRC4, there are
1~31 available time slot for use data. If the data rate of SHDSL line set to
be 512k, the time slot number is 8 and first time slot number is 1. The frame
is shown as below.
FAS Data Data Data Data Data Data Data Data
0 1 2 3 4 5 6 7
8 31
Time Slot
64k 64k 64k 64k 64k 64k 64k 64k 64k 64k1408k
9 ~ 30
The First Time Slot setting of FAS and FAS+ CRC4 have to follow the rule:
RULE
First Time Slot ? 31- Time Slot Number
First Time Slot ? 31- Time Slot Number
Using E1 frame of FAS+CAS or FAS+CAS+CRC4, the FAS will occupy Time
Slot 0 and CAS Time Slot 16. There are only 30 Time Slot left for data. On
the other hand, the data rate is 1920kbps.
FAS
0 1 2 3 4 16
31
Time Slot
64k 64k 64k 64k 64k 64k 64k896k
17 ~ 30
CAS
5 ~ 15
704k
The First Time Slot setting of FAS+CAS and FAS+CAS+CRC4 have to
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